package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVO;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVO;
import com.atguigu.gulimall.auth.vo.UserRegistVO;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    private ThirdPartFeignService thirdPartFeignService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){
        //TODO 1、接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l < 60000){
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        String str="";
        String code = "";
        Random random = new Random();
        for(int i = 0; i < 6; i++){
            str = String.valueOf(random.nextInt(10));
            code += str;
        }
        String subString = code + "_" + System.currentTimeMillis();
/*        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code+"_"+System.currentTimeMillis();*/

        //避雷 --> 有些短信服务不能发送含有字母的验证码
        //2、验证码的再次校验 放入有redis里面暂时存放
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone, subString, 5, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone, code);
        return R.ok();
    }

    /**
     * RedirectAttributes redirectAttributes 模拟重定向携带数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVO vo, BindingResult result, RedirectAttributes redirectAttributes){
        if(result.hasErrors()){

            /**
             * .map(fieldError->{
             *                 String field = fieldError.getField();
             *                 String defaultMessage = fieldError.getDefaultMessage();
             *
             *             })
             */
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors", errors);
            redirectAttributes.addFlashAttribute("errors", errors);
            //校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1、检验验证码
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            if(code.equals(s.split("_")[0])){
                //验证码通过 应该马上删除 令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //真正的注册，调用远程服务进行注册 --> gulimall-member
                R r = memberFeignService.regist(vo);
                if(r.getCode() == 0){
                    //注册成功
                    return "redirect:/login.html";
                }else {
                    //注册失败
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg", new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            }else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else{
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(attribute == null){
            //没登陆
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVO vo, RedirectAttributes redirectAttributes,
                        HttpSession session){
        //远程调用登录服务
        R login = memberFeignService.login(vo);
        if(login.getCode() == 0){
            //TODO 登录成功后的处理
            MemberRespVO data = login.getData("data", new TypeReference<MemberRespVO>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        }else {
            //登录失败
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }

    }
}
